Automatic carburetor adjustment



y *1"*624 631 April 12, 1927. l I l YW. J. SHORT A AUTOMATIC cARu'RETzoR DJUSTMBNT Filed NOV.A '7, 1923 4 atto: um*

VPatented pr.' 12, '5.927,v

W'ILnIaivLfJ. snoer, or-HnBEJI-i4 nrnes; ARKANSAS:

' Aufroivu'LTIG CARURTORAnlusrlyinnrapplicati@ n iagnov'emberv, i923. "seriarir, erfassen The object' of fmy, invention to provide means" for-fthe automatic regulation fof Vthe supply of fuel tothegcarburetor 'ofanjex- Vplosive engine which ywill regulate thev quanj tity tosuit the en'ginegtemperature which will be eflicient simple of construction and convenient of' application to the" engine.

By my invention theteniperature of the ex'- haust gases 4in passing through the' exhaust determines the quanti-ty fof" lfuell l"supplied" to the' carburetor* byV automatically turni-ng the needle valve ofthe carburetor.' My'fin Fig. 4.v

In the embodiment Vof my invention shown in Fig. l I utilize the longitudinal expansion and contraction of the exhaust pipe due to the passage of the .exhaust gases therethrough to impart movement toa conf-v nection between the pipe and the needlev valve. Y

By the construction shown in Fig. l the use of two long operating rods is avoided andthe ymotion of. the exhaust pipe under changes in temperature is magnified whenV applied to the carburetor valve and the carburetor valvev maybe `adjusted by hand if need be without hindrance from the automatic Vturning device. A Y

Describing the construction in detail, a collar, 150, is clamped to the exhaust pipe near the muiiier and from it extends forward a single rod, 21, which at its forward. end is pivoted to a lever, 22, which at mid-V length. is pivoted to a stud, 2,3, on a clamp, 24, which is attached to the main frame or chassis and to the lever, 22, on opposite sides of its pivot are pivoted two rods, 25, which extend forward to and pivotally en-v gage a block or yoke, 2 6, which is held friction tight on the stem, 27,- ofthe needle valve, the Apivotal connection y.between the rods, 25, and said yoke being on opposite sides of the valve stem. The yoke, 26,

preferably engages a A brass bushing, 28, around the valve stem and saidyoke-has a radial slitso that byV alongitufdinal bolt, 26, passingacross the slit it may be 1 atcient togenabl-e the movements of'th'e rods, 25, to vturn the `needle"v alve.,fy there'willbe eehegai with* desired-f frieuonf grip ,mi the' bushing soH that while 'such' grip is sufiienough slip to allow "thejturnoff th'e'valve f Y by hand shouldfihandgadjustment "be re'- (11n-red.V As the 'pointsfof connection of the rods, 25', with? the flever,`221,^are agreater distance from the lever pointt'hanthefpoint 'connectionfwithv ro'dgf'2l, Ltherewiththe 'y imevemen# Tof' the eXhaust. 'Pipe'. under 'changes of "temperaturef'whenf` appliedy `itcl the needle valve 1willffb'e magnified. 'Y f Y slightlytapering and screwedinto the hole in the yoke', :26,1ithaving'a" wrench lengaging' shoulder, '30, to turn and' the? .bushing at. its inner end engages 1packing;'29,t of

asbestos i or otherV material that,r encirclesl the stem within the yoke hole, and thereby is squeezed against the stem to produce a de-y sired friction grip on the stem.

- VTo limit or prevent too great an expan- .Y so

sion of the exhaust pipe as 'in extremely. hard pulling which might reduce the fuel too much rI provide a stop which Vconsists Y f' of an arm,f3l, that is secured bya clamp,

32, to the frame or chassis, 140, (see 'Fig.` l

l) in position to engage. the collar, 150, on the .exhaust pipe E2.

or allow for llongitudinal expansion when stop acts.

WhatI claim is: f -Y V1. The combination of a carburetor valve and the pipe extending from the-exhaustl v manifold of an internal combustion engine,

such pipe being free to move longitudinally f` under vtemperature changes due lto exhaust 'gasesV passing through such pipe, la device connected with and partaking of such longitudinal movement ofsaid pipe, the point of connection between said-device and the pipe beingy a substantial distance from the exhaustmanifold and the carburetorvalve,

' and an operative connection between said device and the carburetorvalve for transmitting to the valve the longitudinal Vmovement of .the exhaust 'pipe and said operative connection comprising meansl to multiply the motion transmitted fr omv theexhaustl pipe.V f .2. The combination of a. carburetor valve andthe exhaust pipe of an internalcombustion engine, such exhaust pipe being free to move longitudinally under temperature changes -due `to exhaust gases passing' The exhaust pipewill have .suiiicient lateral spring to take up lio` through such pipe, a device connected with and partaking of such longitudinal movement of the exhaust pipe, the point of connection between said device and exhaust pipe being a substantial distance fromV the carburetor valve, andan operative connection between said device and the carburetor valve for transmitting to the valve the longitudinal movement of the exhaustpipe, such connection `situated to be substantially unaffectf ed by heat from the exhaust. pipe and said operative connection comprising means to multiply the motion transmitted from the exhaust pipe consisting of a lever and its pivot and a movable member engaging the lever at different distances from the lever pivot, the lever moving member being nearer the pivot. y

3. The combination of a carburetor valve Y and 'the exhaust pipe of an internal combustion engine, a device clamped to said pipe remote from the carburetor valve, a

lever mounted nearer to the valve than said clamp, a pair of rodsextending from said lever on opposite'sides of its center of motion tothe carburetor valve on opposite sides of its center of motion and a single rod extending from said lever to said clamp.

4. The combination with a carburetor valve andV a thermostat for moving the latter comprising the exhaust pipe of an internal combustion engine free to move longitudinally when aifected by the temperay turc of gases passing through the same, and

means to limit such movement of the ex-Y haust pipe.

5. The combination of a carburetor valve and the pipe extending from the exhaust manifold of an internal combustion engine,

such pipe being free to move longitudinally under temperature changes due to exhaust gases passing through such pipe, a. device v permitting independent movement of the valve by hand.,

' In testimony whereof I hereunto affix my signature.

WILLIAM J. SHORT; 

